Dynamics of fatty-acid composition of neutral acylglycerols in maturing euonymus fruits.

The dynamics of the fatty-acid (FA) composition of neutral acylglycerols (NAGs) composed of 1,2,3-triacyl-sn-glycerols (TAGs) and 3-acetyl-1,2-diacyl-sn-glycerols (acDAGs) was determined in the fruit seeds and arils of three Euonymus L. species at three stages of their maturity. The NAG composition comprised 29 FAs, linoleic, oleic, palmitic, and α-linolenic acids being predominant.

Occurrence of fatty acid short-chain-alkyl esters in fruits of Celastraceae plants.

Small amounts of a mixture of fatty acid short-chain-alkyl esters (FASCAEs) were obtained from the fruits of twelve plant species of Celastraceae family, and in five of them the FASCAEs were present not only in the arils but also in the seeds. These mixtures contained 32 individual FASCAE species, which formed four separate fractions, viz. FA methyl, ethyl, isopropyl, and butyl esters (FAMEs, FAEEs, FAIPEs, and FABEs, resp.

Identification of unusual fatty acids of four alpine plant species from the Pamirs.

Fatty acid composition and structure in total lipids from the green above-ground parts of four alpine plants, Oxygraphis glacialis, Primula macrophylla, Rhodiola pamiroalaica, and Swertia marginata, were established by GC and GC-MS. A total of 55 fatty acids was detected, and 48 of them were identified. Ubiquitous palmitate, linoleate, and linolenate predominated in the lipids accounting for about 72-90% of the total fatty acids.

Silver ion liquid-chromatographic mobility of plant diacylglycerols as a function of their composition and spatial arrangement.

Coordination complexes of unsaturated rac-1,2-diacylglycerols (DAGs) with silver ions were separated by adsorption and reversed-phase TLC (silver ion TLC and silver ion RP-TLC, respectively). During silver ion TLC, silver ion complexes are formed by an indeterminate number of coordination centers of various nature and only at the adsorbent surface; separation of the complexes proceeds according to an adsorption mechanism, and there is an inverse exponential relationship between DAG unsaturation and their mobility. With silver ion RP-TLC, the complexes are formed only with double bonds, only in solution, and at a 1:1 ratio; the complexes are fractionated by lipophilic partitioning between two liquid phases, and the relationship between the unsaturation of DAGs and their mobility is a direct linear one.

Changes in triacylglycerol composition during ripening of sea buckthorn (Hippophaë rhamnoides L.) seeds.

Changes in the quantitative composition of triacylglycerols (TAGs) in maturing sea buckthorn (Hippophaë rhamnoides L.) seeds were determined by lipase hydrolysis. As a whole, the rate of synthesis of separate TAG classes increased in proportion to both their unsaturation and relative content (weight percent) in total TAGs.